Hostname: page-component-7bb8b95d7b-nptnm Total loading time: 0 Render date: 2024-09-12T18:57:55.522Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of heat treatment on elastic properties of separated thermal barrier coatings

Published online by Cambridge University Press:  31 January 2011

D. Basu ,
C. Funke  and
R. W. Steinbrech
D. Basu
Affiliation:
Institut für Werkstoffe und Verfahren der Energietechnik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
C. Funke
Affiliation:
Institut für Werkstoffe und Verfahren der Energietechnik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
R. W. Steinbrech
Affiliation:
Institut für Werkstoffe und Verfahren der Energietechnik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
Get access

Abstract

Elastic response behavior of four different plasma-sprayed deposits has been investigated using depth-sensing micro-indentation technique. Due to the high degree of porosity and inhomogeneity of the coatings, the characteristic elastic moduli were found to be in the range of 20–75% of that of the dense bulk material (200 GPa). Considering the wide variation of properties, 150 data points were generated with five different indentation loads for each coating, and statistical tools were employed to represent the scatter of the data. The characteristic elastic moduli of all the coatings were observed to be almost doubled when the magnitude of indentation load was reduced from the highest (1000 mN) to the lowest (30 mN). The coatings were subsequently heat treated at 1100 °C, the operational temperature of a gas turbine, for 2, 25, and 100 h, and in all the coating grades the corresponding elastic moduli increased significantly. However, the stiffening effect was not uniform in two grades and was more pronounced for the smaller indentation loads. The increase in elastic modulus is attributed to elimination of fine porosity and sintering neck formation, an assumption also supported by the results of mercury porosimetry.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 12 , December 1999 , pp. 4643 - 4650
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Grünling, H.W. and Mannsmann, W., J. Phys. (Paris) 4, 903 (1993).Google Scholar
2.DeMasi-Marcin, J.T. and Gupta, D.K., Surf. Coat. Technol. 68/69, 1 (1994).CrossRefGoogle Scholar
3.Grünling, H.W., Schneider, K., and Singheiser, L., Mater. Sci. Eng. 88, 177 (1987).CrossRefGoogle Scholar
4.Shikama, T., Shinmo, H., Fukutomi, M., Fujitsuka, M., and Okada, M., J. Mater. Sci. 18, 3092 (1983).CrossRefGoogle Scholar
5.Vannie, A.G., Solid State Technol. 23, 81 (1980).Google Scholar
6.Williams, D.S., J. Appl. Phys. 57, 2340 (1985).CrossRefGoogle Scholar
7.Marshall, D.B. and Evans, A.G., J. Appl. Phys. 56, 2632 (1984).CrossRefGoogle Scholar
8.Evans, A.G. and Hutchinson, J.W., Int. J. Solids Struct. 20, 455 (1984).CrossRefGoogle Scholar
9.Sinha, A.K., Levinstein, H.J., and Smith, T.E., J. Appl. Phys. 49, 2423 (1978).CrossRefGoogle Scholar
10.Kuroda, S. and Clyne, T.W., Thin Solid Films 200, 49 (1991).CrossRefGoogle Scholar
11.Evans, A.G., Crumley, G.B., and Demaray, R.E., Oxid. Met. 20, 193 (1983).CrossRefGoogle Scholar
12.Evans, A.G. and Hutchinson, J.W., Int. J. Solids Structures 20, 455 (1984).CrossRefGoogle Scholar
13.Lin, C.K. and Berndt, C.C., in Thermal Spray Coatings: Research, Design and Application, edited by Berndt, C.C. and Barnecki, T.F. (ASM International, Materials Park, OH, 1993), p. 561.Google Scholar
14.Lin, C.K., Lin, C.C., and Berndt, C.C., J. Am. Ceram. Soc. 78, 1406 (1995).CrossRefGoogle Scholar
15.King, R.B., Int. J. Solids Struct. 23, 1657 (1987).CrossRefGoogle Scholar
16.Watkins, T.R., Green, D.J., and Rybe, E., in 91st Annual Meeting of the American Ceramic Society, 1989.Google Scholar
17.Blandin, G., Mönch, J., Schubert, F., and Steinbrech, R.W., Internal work report, Forschungszentrum, Jülich, Germany, 13 October 1997.Google Scholar
18.Corcoran, E.M., J. Paint Technol. 41, 635 (1969).Google Scholar
19.Scheiber, E., Anderson, O.L., and Soga, N., Elastic Constants and Their Measurement (McGraw-Hill, New York, 1974).Google Scholar
20.Standard Testing Method for Young's Modulus, Shear Modulus and Poisson's Ratio for Glass and Glass-Ceramics by Resonance, (ASTM Stand. C 623–671, 1971, West Conshohocken, PA, reprinted 1995).Google Scholar
21.Chin-Chen, C. and Eldon, D.C., Mater. Sci. Eng. 132, 39 (1991).Google Scholar
22.Marshall, D.B., Noma, T., and Evans, A.G., J. Am. Ceram. Soc. 65, C–175 (1982).Google Scholar
23.Leigh, S.H., Lin, C.K., and Berndt, C.C., J. Am. Ceram. Soc. 80, 2093 (1997).CrossRefGoogle Scholar
24.Saunders, S.R.J, Surf. Eng. 9, 293 (1993).CrossRefGoogle Scholar
25.Doerner, M.F. and Nix, W.D., J. Mater. Res. 1, 601 (1986).CrossRefGoogle Scholar
26.FISCHERSCOPE H100 Operation Manual (Helmut Fischer GmbH + Co., Sindelfingen, Germany, 1991).Google Scholar
27.Loubet, J.L., Georges, J.M., and Meille, G., in Microindentation Techniques in Materials Science and Engineering, ASTM STP 889, edited by Blau, P.J. and Lawn, B.R. (ASTM, Philadelphia, PA, 1986), p. 72.Google Scholar
28.Sneddon, I.N., Int. J. Eng. Sci. 3, 47 (1965).CrossRefGoogle Scholar
29.Loubet, J.L., Georges, J.M., Marchesini, O., and Meille, G., J. Tribology (ASME) 106, 43 (1984).CrossRefGoogle Scholar
30.Spriggs, R.M., J. Am. Ceram. Soc. 44, 628 (1961).CrossRefGoogle Scholar
31.Rice, R.W., Treatise on Material Science and Technology, edited by MacCrone, R.K. (Academic Press, New York, 1977), Vol. 11, p. 200.Google Scholar
32.Rossi, R.C., J. Am. Ceram. Soc. 51, 433 (1968).CrossRefGoogle Scholar
33.Mcpherson, R. and Cheang, P., in High Performance Ceramic Films and Coatings, edited by Vincenzini, P. (Elsevier, New York, 1991), p. 277.Google Scholar
34.Duan, K. and Steinbrech, R.W., J. Eur. Ceram. Soc. 18, 87 (1998).CrossRefGoogle Scholar
35.Funke, C., Siebert, B., Vasen, R., and Stöver, D., in Thermal Spray: A United Forum for Scientific and Technological Advances, edited by Berndt, C.C. (United Thermal Spray Conf. Proc. 1, Materials Park, OH, 1998), p. 277.Google Scholar
36.Siebert, B., Ph.D. Thesis, Department of Mechanical Engineering, Ruhr University, Bochum, Germany (May, 1999).Google Scholar